MAX16818ETI+ datasheet(2/25 Pages) MAXIM

Part #	MAX16818ETI+

Description	1.5MHz, 30A High-Efficiency, LED Driver with Rapid LED Current Pulsing

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Manufacturer	MAXIM [Maxim Integrated Products]

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1.5MHz, 30A High-Efficiency, LED Driver

with Rapid LED Current Pulsing

2

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC = 5V, VDD = VCC, TA = TJ = TMIN to TMAX, unless otherwise noted. Typical specifications are at TA = +25°C.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SYSTEM SPECIFICATIONS

728

Input Voltage Range

VIN

Short IN and VCC together for 5V input

operation

4.75

5.50

V

Quiescent Supply Current

IQ

EN = VCC or SGND, not switching

2.7

5.5

mA

LED CURRENT REGULATOR

No load, VIN = 4.75V to 5.5V, fSW = 500kHz

0.594

0.6

0.606

SENSE+ to SENSE- Accuracy

(Note 2)

No load, VIN = 7V to 28V, fSW = 500kHz

0.594

0.6

0.606

V

Soft-Start Time

tSS

1024

Clock

Cycles

STARTUP/INTERNAL REGULATOR

VCC Undervoltage Lockout

UVLO

VCC rising

4.1

4.3

4.5

V

VCC Undervoltage Hysteresis

200

mV

VCC Output Voltage

VIN = 7V to 28V, ISOURCE = 0 to 60mA

4.85

5.1

5.30

V

MOSFET DRIVERS

Output Driver Impedance

RON

Low or high output, ISOURCE/SINK = 20mA

1.1

3.0

Ω

Output Driver Source/Sink Current

IDH,IDL

4A

Nonoverlap Time

tNO

CDH/DL = 5nF

35

ns

OSCILLATOR

Switching Frequency Range

125

1500

kHz

Switching Frequency

RT = 500k

Ω

121

125

129

Switching Frequency

RT = 120k

Ω

495

521

547

Switching Frequency

fSW

RT = 39.9k

Ω

1515

1620

1725

kHz

120k

Ω ≤ RT ≤ 500kΩ

-5

+5

Switching Frequency Accuracy

40k

Ω ≤ RT ≤ 120kΩ

-8

+8

%

IN to SGND.............................................................-0.3V to +30V

BST to SGND..........................................................-0.3V to +35V

BST to LX..................................................................-0.3V to +6V

DH to LX .......................................-0.3V to [(VBST - VLX_) + 0.3V]

DL to PGND................................................-0.3V to (VDD + 0.3V)

VCC to SGND............................................................-0.3V to +6V

VCC, VDD to PGND ...................................................-0.3V to +6V

SGND to PGND .....................................................-0.3V to +0.3V

All Other Pins to SGND...............................-0.3V to (VCC + 0.3V)

Continuous Power Dissipation (TA = +70°C)

28-Pin TQFN (derate 34.5mW/°C above +70°C) .......2758mW

Operating Temperature Range

MAX16818ATI+..............................................-40°C to +125°C

MAX16818ETI+................................................-40°C to +85°C

Maximum Junction Temperature .....................................+150°C

Storage Temperature Range .............................-60°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

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